cmFileFSDir is a read-write display string setting the base directory on the remote FTP server (identified by cmFileFSAddr) that the system will use for file transfers, with a subdirectory matching the flash structure appended automatically. An administrator configures this to point at the correct top-level folder on the file server where firmware and configuration files for this system are organized. For example, setting cmFileFSDir to '/cmn/chassis12' would cause the system to request files under that path plus its own internal subdirectory naming when pulling updates.